Put some mildley ported E7's with cobra I/T, 1 5/8 headers, 1.6 RR's, on stock 86 bottom end. Had dist reindexed etc., timing set to around 13 deg. When it idles , it idles like it has a cam, engine shakes at little bit. When you stomp on it, its smooth right up to 5200rpm. Would a 87 & up ecu help it run better? Or is the idle issue maybe vaccum related? Have replaced all vaccum hoses during head swap. Has anyone had similar problem after head swap?
thanks
thanks